片岩损伤裂隙系统定量表征方法的适宜性

发布时间：2018-01-18 03:34

本文关键词：片岩损伤裂隙系统定量表征方法的适宜性　出处：《科学技术与工程》2017年31期 　论文类型：期刊论文

【摘要】：岩石损伤过程实质上是内部裂隙系统发育、扩展的过程,定量表征岩石裂隙率是间接获得岩石力学特性损伤劣化规律的关键。首先,通过冻融循环试验和压缩试验,得到武当群片岩单轴抗压强度、弹性模量、黏聚力、内摩擦角等力学参数与冻融循环次数关系。采用CT扫描和超声波测试方法,分别得到试样CT数与冻融循环次数、纵波波速与冻融循环次数之间的关系。对CT数、纵波波速变化规律与力学参数变化规律进行相关性分析。结果表明,纵波波速与片岩力学参数相关性更显著,主要原因可能是超声波更适合于测试微观损伤裂隙。研究结果对于岩石损伤裂隙系统定量化表征具有一定参考价值。
[Abstract]:Rock damage process is essentially a process of internal fracture system development and expansion. Quantitative characterization of rock fracture rate is the key to indirectly obtain damage degradation law of rock mechanical properties. Through freeze-thaw cycle test and compression test, uniaxial compressive strength, elastic modulus and cohesion of Wudang schist are obtained. The relationship between the mechanical parameters such as the angle of internal friction and the number of freeze-thaw cycles. The CT number of samples and the number of freeze-thaw cycles were obtained by CT scanning and ultrasonic testing. The relationship between the velocity of P-wave and the number of freeze-thaw cycles. The correlation analysis of CT number, variation law of P-wave velocity and mechanical parameters is carried out. The results show that the correlation between P-wave velocity and mechanical parameters of schist is more significant. The main reason may be that ultrasonic wave is more suitable for testing micro-damage fracture, and the results have some reference value for quantitative characterization of rock damage fracture system.
【作者单位】：武汉工程大学资源与土木工程学院;中国地质大学(武汉)工程学院;
【分类号】：TU45
【正文快照】： 引用格式:王章琼,晏鄂川.片岩损伤裂隙系统定量表征方法的适宜性[J].科学技术与工程,2017,17(31):17—22Wang Zhangqiong,Yan EChuan.Suitability of quantitative characteriza-tion for schist damage fracture system[J].Science Technology and Engi-neering,2017,17(31):

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